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Related Experiment Videos

Function of the Yersinia effector YopJ.

Kim Orth1

  • 1Department of Molecular Biology, 5323 Harry Hines Boulevard, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. kimorth@hamon.swmed.edu

Current Opinion in Microbiology
|February 9, 2002
PubMed
Summary

The Yersinia virulence factor YopJ protein blocks host immune responses and apoptosis by inhibiting key signaling pathways. This cysteine protease

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Area of Science:

  • Microbiology
  • Immunology
  • Molecular Biology

Background:

  • Yersinia virulence factor YopJ inhibits host immune responses.
  • YopJ induces apoptosis by blocking MAPK and NF-kappaB signaling pathways.
  • YopJ is a cysteine protease cleaving ubiquitin or ubiquitin-like proteins.

Purpose of the Study:

  • To review the mechanism of YopJ in inhibiting host immune response.
  • To discuss YopJ's role as a ubiquitin-like protein protease.
  • To explore YopJ's activity in mammalian signaling pathways.

Main Methods:

  • Literature review of Yersinia virulence factor YopJ.
  • Analysis of YopJ's protease activity.
  • Examination of YopJ's impact on host signaling pathways.

Main Results:

  • YopJ blocks host innate immune response and induces apoptosis.
  • YopJ cleaves reversible post-translational modifications like ubiquitin.
  • Homologues of YopJ are found in diverse pathogens and symbionts.

Conclusions:

  • YopJ employs a conserved mechanism to regulate signaling pathways.
  • Understanding YopJ's function provides insights into host-pathogen interactions.
  • YopJ's protease activity is crucial for virulence and immune evasion.

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